_______ I admit the problem is very serious, I don’t think it can’t be solved．
A．While B．When C．As D．Because
We have planted a lot of trees to _____ wind and sand in the desert．
A．hold up B．hold down
C．hold back D．hold out
I was laid off last month so ______ I borrowed some money in my life
A．first time B．for the first time
C．the first time D．by the first time
Seeing your picture, I could not resist _____ the days _____ we spent together.
A. to think of; when B. to think of; which
C. thinking of; which D. thinking of; when
He was _________down for several days after he heard the bad news .
A. broken B. cast C. cut D. discouraged
_______news came ________an unknown disease was spreading in the area .
A. Disturbing / that B. Disturbed / which C. Disturbing / which D. Disturbed / what
